Pulse-poundingly breathtaking, Mayday Mayday, follows the fearless men and women of the RNLI. These volunteers, operating lifeboats around Britain’s rough and weather-beaten coastline, must be ever-ready to come to the aid of those in trouble at sea. Using footage from state-of-the-art helmet and boat cameras, this unique view of lifeboat crews on active duty takes you to the heart of the danger, the risk and the reward.